Interact with the visualization by moving the mouse over the map at the top left to show the emergent, rest frame spectrum at different points on the surface in the plot at the bottom left. Scroll (with the mouse wheel or track pad) to change the wavelength at which the map is visualized (top left) or to rotate the orthographic projection of the map (top right). The plot at the bottom right shows the observed spectrum at the current phase (black) and the corresponding rest frame spectrum absent Doppler shifts (orange).